Core assembly machine



Jan. 9, 1951 P. F. sKooG CORE ASSEMBLY MACHINE Filed April 28, 1947 2Sheets-Sheet l SKOOG P. F. SKOOG CORE ASSEMBLY MACHINE Jan. 9, 1951Filed April 28, 1947 .IIII

Patented Jan. 9, 1.951

"UNIT ED S TATE S "PATENT O FF l CE CORE ASSEMBLY MACHINE Per F. Skoog,Olympia, Wash. Application April 28, 1947, Serial N o. 744,345

1 Claim.

This invention relates generally to the wood working industry andparticularly to a method of and apparatus for forming cores.

The main object of this invention is to make possible the formation of acontinuous core of wood, to save labor in doing so and to insure asatisfactory and uniform gluing action throughout the core.

The second object is to make possible the formation of cores of anylength and width from remnants and edgings of lumber or plywood.

These and other objects are accomplished in the manner set forth in thefollowing specification as illustrated in the accompanying drawing, inwhich:

Fig. 1 is a plan of the apparatus.

Fig. 2 is a section taken along the line 2 2 in Fig. 1.

Fig. 3 is a section taken along the line 3--3 in Fig. 2.

Fig. 4 is an enlarged section also taken along the line 2 2 in Fig. 1.

Referring in detail shown a lower inlet to the drawings, there is jawIIJ which is parallel with and substantially level with the lower outletjaw I I between which is disposed a table or ways I 2 which is ilushwith the two surfaces of the J'aws I0 and I I. It is desirable toprovide a heating element I3 under the surface of the table I2. The jawsI B and I I are strongly supported by the I beams I4 and I5.

Above the inlet jaw II) is a movable inlet jaw I6 which is urgeddownwardly by the pneumatic cushion II which is disposed along theunderside of the I beam I8. Spaced above the lower outlet jaw II is anupper outlet jaw I9 which is urged downwardly by the pneumatic cushion20 which is disposed against the underside of the I beam 2I. It will benoted that the cushions I'I and 20 are in channels 22 and `23 and areseparated from the jaws I [I and II by narrow strips 24 and 25.

A heating element 26 is placed above the underside of the jaws I6 andI9. A magazine 2l for strips 28 is disposed along the inlet jaws of themachine. Suitable glue applying rolls 29 are also provided. Guides orways 30 are provided between the members I8 and 2| and. their purpose isto loosely guide the forming core from 2 the inlet jaws I0 and I6 to theoutlet jaws II and I9.

Suitable means are provided for maintaining the desired pressure on thecushions I 'I and 20. This can be accomplished easily by an air inletValve 3|V which can be connected to an air hose in the same manner as isa pneumatic tire.

Movable under the magazine 21 and toward the jaws I0 and IE is apressure bar 32 to which pressure may be applied by one or more cylinders 33 whose pistons 34 are connected to the bar 32.

The operation of the apparatus and the practice of my method is asfollows:

Assuming that there is a supply of strips 28 in the magazine 2'l andthat glue is being supplied to one or both edges of the lowermost strip28 and pressure is brought to bear on the strip which will force it intothe space between the jaws I n and I6, it follows that each time the bar32 is withdrawn another strip 28 will come into position and the nextfeeding movement of the bar 32 will force the rst strip out of theclamping jaws III and II into the space between the heating elements I3and 26 and so on until the outlet jaws II and I9 are reached, and thiswill require additional pressure in order for the core to pass out ofthe machine.

Obviously, the rate of feeding of the strips 28 and the spacing of thejaws Il] and II, as well as the kind of glue used, must be such as toinsure a safe setting of the glue before the core is ejected.

In some cases a crank action can be employed instead of the ram asshown. Thus, it can be seen that cores of any length can be made in acontinuous manner and the pressure applied in a uniform manner and inthe proper direction.

In some cases where special glues are used,

may be dispensed with.

I claim:

A core assembling machine having in combi nation a pair of horizontalways between which core material in front end of the machine, means forapplying glue to 3 the strips as they leave the magazine, a pressure barfor pushing each Strip from the bottom of the magazine and between thefirst pair of jaws and means for supplying heat to the core as it passesbetween said ways.

PER F. SKOOG.

REFERENCES CITED The following references are of record in the flle ofthis patent: i0

UNITED STATES PATENTS Number Name Date 647,056 Ward Apr. 10, 1900794,873 Mayhew July 18, 1905 M Number Number Name Date Mayhew July 18,1905 Jones Dec. 4, 1928 Weber Feb. 12, 1929 Nicholson Nov. 8, 1938Bowling Mar. 21, 1944 Bolling Jan. 2, 1945 Pfenning.l June 12, 1945 HallSept. 24, 1946 Maurer Oct. 22, 1946 Blhuber Nov. 9, 1948 FOREIGN PATENTSCountry Date Great Britain June 5, 1939

